Vacuum drying in battery cell production

Process-safe solutions for efficient e-mobility

Drying electrodes carefully and safely with vacuum dryers from weisstechnik®

Vacuum drying technology is indispensable in the production of lithium-ion batteries. We design customized vacuum dryers that can be integrated into production lines and research facilities as needed. Our vacuum dryers work extremely efficiently and process-optimized.

Interview with the expert

Stefan Betz

Product Manager Heat Technology

What advantages does vacuum technology offer in drying processes?

According to the vapor pressure-temperature curve, reduced air pressure also reduces the boiling point of liquid mixtures. These then evaporate at much lower temperatures and can be actively sucked out of a recipient. Therefore, sensitive products do not need to be heated as much in a vacuum to achieve the same drying performance. All air and vapor pockets in the product are removed and re-condensation after the drying process is reliably prevented. This makes vacuum drying the perfect solution wherever moisture has to be carefully removed from sensitive materials without leaving any residue and in a process-safe manner.

How can vacuum drying be used in battery manufacturing?

Vacuum drying is the final step in electrode production. To ensure that the batteries later offer the required performance and longevity, the coated coils must be dried in the most efficient way possible. In the process, even the smallest residues of moisture and solvents are removed from them. Vacuum dryers with circulating air tempering realize this process particularly efficiently. After complete drying, the coils are transferred to cell assembly, where they are further processed under controlled drying room conditions – dew point - 60°C, for example.

How does vacuum drying optimize the production of lithium-ion batteries?

Currently, there are no established or standardized standard processes for vacuum drying in battery manufacturing. That’s why it’s exciting to support research manufacturing and help develop these standards. We do this with our customized and process-optimized vacuum drying solutions for efficient and safe battery production. We integrate these into the production line as required. Since flammable solvents are used in electrode production, process reliability is a particularly important aspect. To ensure this, we use our extensive experience in thermal engineering.



Product-friendly, precise, process-safe, cross-industry experience with vacuum drying

We are a cross-industry experienced specialist for industrial heating technology and vacuum drying processes. We plan and implement individual drying solutions that are optimally matched to products and processes. In doing so, we offer integrated system solutions and, if required, also design the vacuum pump technology. In this way, we offer reliable and economical solutions for reproducible drying results in the long term.

Dry safely faster
Optimize process times

Short process times are important in industrial battery production. To dehumidify the temperature-sensitive battery electrodes as quickly as possible and at the same time completely and safely, we recommend particularly gentle hybrid drying systems with circulating air temperature control. The fast process with short heat-up time achieves optimum drying results and eliminates air pockets in the electrodes. This is crucial for the performance of the batteries.

Flexible integration in research and production
Customized batch and conveyor furnaces

Depending on the application and process, we develop vacuum drying solutions that fit seamlessly into the battery production line: customized batch furnaces with tailored coil fixtures or conveyor furnaces integrated into production lines for high production capacities. Our vacuum dryers are suitable for both research projects and industrial battery production.

Everything always under control
Safe quality due to consistent manufacturing conditions

For high battery quality, the entire manufacturing process must take place under controlled, dry environmental conditions. A crucial point here is the connection between the individual production steps. Vacuum dryers can be used as an airlock for the electrodes between the different drying rooms. Passing the coils through the airlock ensures that the low dew points of -40 to -60 ºC are not interrupted.

All from a single source
Solutions for the production of lithium-ion batteries

As part of the Schunk Group, we offer experience, expertise, and diverse solutions for the production of lithium-ion batteries. These include innovative and flexible ultrasonic welding solutions from Schunk Sonosystems, adsorption dryers from Weiss Klimatechnik for reliably low dew points, and a wide variety of environmental simulation solutions for testing batteries under a wide range of conditions.

Contact us!


If you would like to learn more about our vacuum drying solutions for your lithium-ion battery production, we would be happy to advise you personally and develop an individual solution for your requirements.

Your contact:

Stefan Betz
Product Manager Heat Technology
+49 6408/84-6362